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Water heater with lint collection detectionRelated Patent Categories: Liquid Heaters And Vaporizers, Stand Boiler (e.g., Water Heater, Etc.), And Condition Responsive Feature, Controls BurnerWater heater with lint collection detection description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070079770, Water heater with lint collection detection. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application is a continuation of U.S. Ser. No. 11/003,749 filed on Dec. 3, 2004. FIELD OF THE INVENTION [0002] This invention relates to water heaters and burners used in conjunction with such water heaters. In particular, this invention relates to gas-fired water heaters, burners for such water heaters and lint detection systems used in conjunction with such burners. BACKGROUND [0003] Reducing polluting emissions from gas-fired water heaters, such as NO.sub.x emissions, continues to be an important objective. Governmental regulations in connection with NO.sub.x emissions continue to become more stringent and it has been a longstanding objective in the industry to continue to reduce NO.sub.x emissions to the point of ultra-low NO.sub.x emissions, such as 10 Ng/J or even less. [0004] Water heater manufacturers have, over the years, attempted to reduce NO.sub.x emissions through a variety of approaches, one approach utilizing radiant screen-type burners. One example is the radiant screen-type burner disclosed in U.S. Pat. No. 5,317,992. However, there have been a series of problems associated with simultaneously achieving: 1) the low NO.sub.x goal, 2) providing a burner that is resistant to build up of lint, dirt, oils and the like or that can shut itself off when too much of a build-up occurs, 3) being able to manufacture a gas-fired water heater in an economical fashion and 4) to produce a water heater that is safe, has excellent longevity and is noise free upon either initial ignition of the burner or during continued combustion on the burner. To date, such efforts have not been completely successful. SUMMARY OF THE INVENTION [0005] This invention is directed to a water heater including a water container, a combustion chamber adjacent the water container, a burner associated with the combustion chamber and arranged to combust fuel to heat water in said water container, said burner having a combustion surface and adapted to receive fuel, a pilot burner that produces heat positioned adjacent the combustion surface; and means for collecting contaminants from fuel and/or air flowing to the pilot burner such that collection of a selected amount of the contaminants reduces the flow of the air and/or fuel, thereby reducing production of the heat and shutting off the burner by dropping out the thermocouple or thermopile. [0006] This invention is also directed to a water heater including a water container, a combustion chamber adjacent the water container, a burner associated with the combustion chamber and arranged to combust fuel to heat water in the water container, the burner having a combustion surface and adapted to receive fuel, and a device that collects contaminants from fuel and/or air flowing to the pilot burner such that collection of a selected amount of the contaminants reduces the flow of the air and/or fuel, thereby reducing production of the heat and shutting off the burner by dropping out the thermocouple or thermopile. [0007] This invention relates to a water heater including a water container, a combustion chamber adjacent the water container, a burner associated with the combustion chamber and arranged to combust fuel to heat water in the water container, the burner including a plenum chamber having a combustion surface and a fuel/air connection extending from the plenum and adapted to receive fuel and air, a pilot burner positioned adjacent the combustion surface, and an air supply line extending between the fuel/air conduit and the pilot burner. [0008] This invention also relates to a water heater including a water container, a combustion chamber adjacent the water container, a burner associated with the combustion chamber and arranged to combust fuel to heat water in the water container, the burner including a plenum chamber having a combustion surface and a fuel/air conduit extending from the plenum and adapted to receive fuel and air, and a pilot burner positioned adjacent the combustion surface and at an angle that is between about 30.degree. and about 60.degree. out of vertical. [0009] This invention further relates to a water heater including a water container, a combustion chamber adjacent the water container, a burner associated with the combustion chamber and arranged to combust fuel to heat water in the container, the burner including a plenum chamber having a combustion surface and a fuel/air conduit extending from the plenum and adapted to receive fuel and air, a pilot burner including an inner elongated sheath having opposed end portions, an outer elongated sheath concentrically positioned around the inner sheath and having opposed end portions, wherein one of the opposed end portions of the outer sheath has a plurality of openings sized and shaped to admit combustion air into the outer sheath, and a ring-shaped member sealingly positioned in a space formed between the inner and outer sheath. [0010] This invention still further relates to a low NO.sub.x water heater burner system including a plenum chamber having a porous combustion surface, a pilot burner positioned adjacent the combustion surface, a fuel/air supply conduit opening into the plenum chamber, and an air supply line extending between the fuel/air supply line and the pilot burner. [0011] This invention further also relates to a low NO.sub.x water heater burner system including a plenum chamber having a combustion surface, a fuel/air conduit extending from the plenum and adapted to receive fuel and air, and a pilot burner positioned adjacent the combustion surface and at an angle that is between about 30.degree. and about 60.degree. out of vertical. [0012] This invention further still relates to a low NO.sub.x water heater burner system including a plenum chamber having a combustion surface and a fuel/air conduit extending from the plenum and adapted to receive fuel and air, a pilot burner including an inner elongated sheath having opposed end portions, an outer elongated sheath concentrically positioned around the inner sheath and having opposed end portions, wherein one of the opposed end portions of the outer sheath has a plurality of openings sized and shaped to admit combustion air into the outer sheath, and a ring-shaped member sealingly positioned in a space formed between the inner and outer sheath. BRIEF DESCRIPTION OF THE DRAWINGS [0013] FIG. 1 is a schematic partial sectional view of a water heater in accordance with aspects of the invention which emphasizes certain features of the water heater and omits others for ease of understanding. [0014] FIG. 2 is a schematic top plan view of a combustion chamber of the water heater shown in FIG. 1. [0015] FIG. 3 is a schematic partial sectional view of a water heater in accordance with another aspect of the invention which emphasizes certain features of the water heater and omits others for ease of understanding. [0016] FIG. 4 is a schematic top plan view of a combustion chamber of the water heater shown in FIG. 3. [0017] FIG. 5 is a front elevational view of a combustion chamber and burner in accordance with aspects of the invention. [0018] FIG. 6 is a schematic side view of portions of a burner in accordance with aspects of the invention. [0019] FIG. 7 is a schematic top plan view of a burner and a pilot burner in accordance with the invention positioned within a combustion chamber. Continue reading about Water heater with lint collection detection... Full patent description for Water heater with lint collection detection Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Water heater with lint collection detection patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Water heater with lint collection detection or other areas of interest. ### Previous Patent Application: Heating and hot water supplying system using fuel cell Next Patent Application: Water heater with air intake and exhaust system Industry Class: Liquid heaters and vaporizers ### FreshPatents.com Support Thank you for viewing the Water heater with lint collection detection patent info. 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